area_curves: Break long line

Author: amitsaha

chapter7/solutions/area_curves.py

@@ -24,4 +24,5 @@ def find_area(f, g, var, a, b):
         print('One of the functions entered is invalid')
     else:
         var = Symbol(var)
-        print('Area enclosed by {0} and {1} is: {2} '.format(f, g, find_area(f, g, var, l, u)))
+        print('Area enclosed by {0} and {1} is: {2} '.
+              format(f, g, find_area(f, g, var, l, u)))